An Efficient Data Transmission with GSM-MPAPM Modulation for an Indoor VLC System

Abstract

As an emerging wireless communication technique, visible light communication is experiencing a boom in the global communication field, and the dream of accessing to the Internet with light is fast becoming a reality. The objective of this study was to put forward an efficient and theoretical scheme that is based on generalized spatial modulation to reduce the bit error ratio in indoor short-distance visible light communication. The scheme was implemented while using two steps in parallel: (1) The multi-pulse amplitude and the position modulation signal were generated by combining multi-pulse amplitude modulation with multi-pulse position modulation using transmitted information, and (2) certain light-emitting diodes were activated by employing the idea of generalized spatial modulation to convey the generated multi-pulse amplitude and position modulation optical signals. Furthermore, pulse width modulation was introduced to achieve dimming control in order to improve anti-interference ability to the ambient light of the system. The two steps above involved the information theory of communication. An embedded hardware system, which was based on the C8051F330 microcomputer and included a transmitter and a receiver, was designed to verify the performance of this new scheme. Subsequently, the verifiability experiment was carried out. The results of this experiment demonstrated that the proposed theoretical scheme of transmission was feasible and could lower the bit error ratio (BER) in indoor short-distance visible light communication while guaranteeing indoor light quality.

A Bandwidth Efficient Hybrid Multilevel Pulse Width Modulation for Visible Light Communication System: Experimental and Theoretical Evaluation

“…We choose to divide the single bit duration into 4 segments and each segment can transmit 4 bits. Among the previous studies [23] and [24] are closely related to our study. The study in [23], used PWM and PPM in one signal period to represent binary data for 8 constellation points 3 bits can be transmitted.…”

“…Authors employed DPAM for keeping the LED luminous flux constant in each signal period. In [24], the authors proposed a generalized spatial modulation with multi-pulse amplitude and position modulation. Multiple pulse position modulation and pulse amplitude first used to make the transmission signal and then specific LEDs are chosen to transmit data.…”

“…In addition, DPAM is used for dimming control with pulse width fixed. In the case of [24], MPPM and MPAM are combined to make MPAPM for data transmission with GSM for MIMO communication. In our approach, we combined PWM and PAM to create a data signal which can transmit 4-bits, and pulse width change is dynamic.…”

Selected Papers from IIKII 2019 Conferences in Symmetry

“…Bao et al reported "An Efficient Data Transmission with GSM-MPAPM Modulation for an Indoor VLC System" [14]. The objective of this study was to put forward an efficient and theoretical scheme that is based on generalized spatial modulation to reduce the bit error ratio in indoor short-distance visible light communication.…”

Performance analysis of hybrid MPAPM technique for deep‐space optical communications

“…To further enhance the system performance, the advantages of M-PPM and M-PAM are combined in multiple pulse amplitude and position modulation (M-PAPM) [25]. Alternatively, various modulation formats with different hybrid approaches for OWC system have been proposed over the years [26][27][28][29][30][31][32][33][34]. Hybrid modulation techniques can simultaneously transmit higher data with both high spectral and power efficiencies over traditional modulation techniques [29].…”